local nvim_lsp = require("lspconfig")

vim.lsp.set_log_level("debug")

local on_attach = function(client, bufnr)
  -- TODO: use vim.api.nvim_create_autocmd
  vim.api.nvim_exec2([[autocmd User LspDiagnosticsChanged call lightline#update()]], { output = false })

  local opts = { noremap = true, silent = false }
  vim.api.nvim_buf_set_keymap(bufnr, "n", "gd", "<Cmd>lua vim.lsp.buf.definition()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "gD", "<Cmd>lua vim.lsp.buf.type_definition()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>gd", "<Cmd>lua vim.lsp.buf.definition()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>gD", "<Cmd>lua vim.lsp.buf.type_definition()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>k", "<Cmd>lua vim.diagnostic.open_float()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>e", "<Cmd>lua vim.lsp.buf.rename()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>r", "<Cmd>lua vim.lsp.buf.references()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>i", "<Cmd>lua vim.lsp.buf.implementation()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>ca", "<Cmd>lua vim.lsp.buf.code_action()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>ci", "<Cmd>lua vim.lsp.buf.incoming_calls()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>co", "<Cmd>lua vim.lsp.buf.outgoing_calls()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "K", "<Cmd>lua vim.lsp.buf.hover()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "]e", '<Cmd>lua vim.diagnostic.goto_next({severity="Error"})<CR>', opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "[e", '<Cmd>lua vim.diagnostic.goto_prev({severity="Error"})<CR>', opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "]d", "<Cmd>lua vim.diagnostic.goto_next()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "[d", "<Cmd>lua vim.diagnostic.goto_prev()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "cd", "<Cmd>lua vim.diagnostic.hide(nil, 0)<CR>", opts)

  -- fzf triggers:
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fr", "<Cmd>References<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fi", "<Cmd>Implementations<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fs", "<Cmd>DocumentSymbols<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fw", "<Cmd>WorkspaceSymbols<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fc", "<Cmd>CodeActions<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fci", "<Cmd>IncomingCalls<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fco", "<Cmd>OutgoingCalls<CR>", opts)

  require("lsp_signature").on_attach({
    hint_enable = false,
  })

  require("copilot_cmp").setup()
end

-- Go

local capabilities = require("cmp_nvim_lsp").default_capabilities()
capabilities.textDocument.completion.completionItem.snippetSupport = false
capabilities.textDocument.completion.completionItem.resolveSupport = {
  properties = {
    "documentation",
    "detail",
    "additionalTextEdits",
  },
}

nvim_lsp.gopls.setup({
  settings = {
    gopls = {
      staticcheck = true,
      -- Disabling linksInHover may not be working as expected:
      linksInHover = false,
      usePlaceholders = true,
      experimentalPostfixCompletions = true,
      analyses = {
        unusedparams = true,
        shadow = true,
        unusedwrite = true,
        unusedresult = true,
        nilness = true,
      },
      buildFlags = { "-tags=acceptance,basketapitest,graphqlapitest" }
    },
  },
  init_options = {
    usePlaceholders = true,
  },
  capabilities = vim.tbl_extend(
    "error",
    capabilities,
    {
      workspace = {
        didChangeWatchedFiles = {
          dynamicRegistration = true
        }
      }
    }
  ),
  on_attach = on_attach,
})

-- Rust
nvim_lsp.rust_analyzer.setup({
	capabilities = capabilities,
	on_attach = on_attach,
	settings = {
		["rust-analyzer"] = {
			imports = {
				granularity = {
					group = "module",
				},
				prefix = "self",
			},
			cargo = {
				buildScripts = {
					enable = true,
				},
			},
			-- procMacro = {
			-- 	enable = false,
			-- },
			-- diagnostics = {
			-- 	disabled = { "unresolved-proc-macro" },
			-- },
		},
	},
})

-- Ruby

nvim_lsp.solargraph.setup({
  on_attach = on_attach,
  settings = {
    solargraph = {
      autoformat = false,
      formatting = false,
    },
  },
})

-- Typescript
-- https://jose-elias-alvarez.medium.com/configuring-neovims-lsp-client-for-typescript-development-5789d58ea9c

nvim_lsp.ts_ls.setup({
  on_attach = on_attach,
})

local filetypes = {
  typescript = "eslint",
  typescriptreact = "eslint",
}

-- diagnosticls

local linters = {
  eslint = {
    sourceName = "eslint",
    -- fallback to global eslint if the local is not found?
    -- https://github.com/creativenull/diagnosticls-configs-nvim/blob/e7d6f7e99f6b416d2aeee89314bc46fc36df7b22/lua/diagnosticls-configs/fs.lua#L20
    command = "./node_modules/.bin/eslint",
    rootPatterns = { ".eslintrc", ".eslintrc.js" },
    debounce = 100,
    args = { "--stdin", "--stdin-filename", "%filepath", "--format", "json" },
    parseJson = {
      errorsRoot = "[0].messages",
      line = "line",
      column = "column",
      endLine = "endLine",
      endColumn = "endColumn",
      message = "${message} [${ruleId}]",
      security = "severity",
    },
    securities = { [1] = "error", [2] = "warning" },
  },
}

nvim_lsp.diagnosticls.setup({
  on_attach = on_attach,
  filetypes = vim.tbl_keys(filetypes),
  init_options = {
    linters = linters,
    filetypes = filetypes,
  },
})

-- Lua

local runtime_path = vim.split(package.path, ";")
table.insert(runtime_path, "lua/?.lua")
table.insert(runtime_path, "lua/?/init.lua")

nvim_lsp.lua_ls.setup({
  settings = {
    Lua = {
      runtime = {
        version = "LuaJIT",
        path = runtime_path,
      },
      diagnostics = {
        globals = { "vim" },
      },
      workspace = {
        library = vim.api.nvim_get_runtime_file("", true),
      },
      telemetry = {
        enable = false,
      },
    },
  },
  on_attach = on_attach,
})

-- Bash language server

-- https://github.com/bash-lsp/bash-language-server#neovim
vim.api.nvim_create_autocmd("FileType", {
  pattern = "sh",
  callback = function()
    vim.lsp.start({
      name = "bash-language-server",
      cmd = { "bash-language-server", "start" },
    })
  end,
})